import router from './router'
import store from './store'
import {
  Message
} from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import {
  getToken
} from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'

NProgress.configure({
  showSpinner: false
}) // NProgress Configuration

const whiteList = ['/login', '/auth-redirect'] // no redirect whitelist

router.beforeEach(async (to, from, next) => {
  // start progress bar
  NProgress.start()


  // set page title
  document.title = getPageTitle(to.meta.title)

  // determine whether the user has logged in
  const hasToken = getToken()

  if (hasToken) {
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({
        path: '/'
      })
      NProgress.done() // hack: https://github.com/PanJiaChen/vue-element-admin/pull/2939
    } else {
      // determine whether the user has obtained his permission roles through getInfo
      const hasRoles = store.getters.roles && store.getters.roles.length > 0
      console.log(hasRoles)
      if (hasRoles) {
        if (to.matched.length === 0) {
          next('/404') // 判断此跳转路由的来源路由是否存在，存在的情况跳转到来源路由，否则跳转到404页面
        }
        next()
      } else {
        try {
          // get user info
          // note: roles must be a object array! such as: ['admin'] or ,['developer','editor']
          const {
            roles
          } = await store.dispatch('user/getInfo')

          const
            menus = await store.dispatch('user/getMenus')

          const
            permissions = await store.dispatch('user/getPermissions')

          // const {
          //   permissions
          // } = await store.dispatch('user/getPermission')

          // generate accessible routes map based on roles
          const accessRoutes = await store.dispatch('permission/generateRoutes', {
            menus,
            permissions
          })
          // dynamically add accessible routes
          router.addRoutes(accessRoutes)
          await store.dispatch('user/getRoleButtons')
          if (to.matched.length === 0) {
            next('/404') // 判断此跳转路由的来源路由是否存在，存在的情况跳转到来源路由，否则跳转到404页面
          }
          // hack method to ensure that addRoutes is complete
          // set the replace: true, so the navigation will not leave a history record
          next({
            ...to,
            replace: true
          })


        } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('user/resetToken')
          console.log(error)
          Message.error('Has Error', error)
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
      }
    }
  } else {
    /* has no token*/

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})
